Feature:1. [Precise Sound Level Meter] This sound level meter uses precise capacitor microphone and is equipped with A weighting device for measuring noise levels from 30 to 130 dB with an accuracy of 1.5 dB, and frequency from 31.5Hz to 8KHz.2. [Backlit LCD Display] Designed with a large LCD screen for easy readability. Simply press and hold the backlit button to activate the backlit, making it easy to view even in low light conditions.3. [Multi Function] Offers maximum or minimum measurement values to show the peak values of sound generated within a certain period and date hold function to freeze current readings.4. [Bluetooth Function] Easily connects to Bluetooth devices to enhance user experience. Simply click the Bluetooth on the main interface to search and connect to the desired device.5. [Wide Application] Perfect for monitoring noise levels in communities, home theaters, sound systems, cars, workshops, schools, offices, factories, and more.Specification:Item Type: Sound Level MeterMaterial: ABS Battery Type: 3 x AAA Batteries (Not Included) Measurement Range: 30-130 dBA Accuracy: 1.5 dB Digit and Resolution: 4 Digits, 0.1 dB Frequency Response: 31.5Hz to 8KHz Frequency Weighting: A (Analogous to Human Ear) Sampling Frequency: 2 Times Per Second Microphone: 1/2 Inch Condenser MicrophoneMaximum Value Lock: Yes Auto Backlit Display: Yes Low Battery Indication: Yes Manual Auto Power Off: Yes.Package List:1 x Sound Level Meter1 x Windproof Cover1 x User Manual